After characterizing the link communication performance, we investigate the link-aware beaconing scheme design in this chapter. Particularly, we confirmed that among many types of contextual information, NLoS link condition is the key factor of V2V performance degradation, which can significantly deteriorate the beaconing reliability. In this chapter, we propose a link-aware reliable beaconing scheme, named CoBe (i.e., Cooperative Beaconing), to enhance the broadcast reliability for road-safety applications. CoBe is a fully distributed scheme, in which a vehicle first detects the link condition with each neighbor by machine learning algorithms, then exchanges such link condition information with its neighbors, and finally selects the minimal number of helper vehicles to rebroadcast its beacons to those neighbors in bad link conditions. To analyze and evaluate the performance of CoBe theoretically, we devise a two-state Markov chain model to mimic beaconing behaviors under LoS/NLoS conditions. In addition to CoBe, we also present a case study of efficient unicasting scheme for non-road-safety applications. Extensive trace-driven experiments are carried out, and the results demonstrate the efficacy of both broadcasting and unicasting schemes.
Link-Aware Reliable Beaconing Scheme Design
Wireless Networks
2020-08-07
27 pages
Article/Chapter (Book)
Electronic Resource
English